MAX4373HEUA+

The MAX4373HEUA+ is a low cost, micropower, high side current sense supervisor in 8 pin μMAX package. This device contains a high side current sense amplifier, bandgap reference and comparator with latching output to monitor a supply for an overcurrent condition. It features a voltage output that eliminates the need for gain setting resistors making it ideal for applications where battery/DC current monitoring is critical. High side current monitoring is especially useful in battery-powered systems since it does not interfere with the ground path of the battery charger. The 0 to +28V input common mode range is independent of the supply voltage which ensures that the current sense feedback remains viable even when connected to a battery pack in deep discharge. The comparator output of the MAX4373 is latched to provide a turn-off flag that doesn’t oscillate. It is used in power management systems, general system/board level current monitoring and precision current sources.

• Integrated current sensing solution simplifies high side current monitoring
• Supply voltage range from 2.7V to 28V
• Operating temperature range from -40°C to 85°C
• Input bias current of 2.5μA (VRS+ <gt/> 2V) and input offset voltage of 0.1mV at TA = +25°C
• Full scale accuracy of 2%
• Internal bandgap reference of ±1.6% accuracy
• Low power consumption extends battery life, supply current of 50μA
• Common mode rejection of 85dB at VRS+ <gt/> 2V and power supply rejection of 87dB at VRS+ <gt/> 2V
• Gain of +100V/V and -3dB bandwidth of 120KHz at VSENSE = 100mV, gain = +50V

Applications

System Monitoring, Portable Devices, Consumer Electronics

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party